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Respiratory Tract Fungal Culture (Upper Respiratory Specimen)

Published: August 9, 2026Updated: August 16, 2026

This test helps identify fungal organisms present in your upper respiratory tract, such as your nose or throat, by growing and examining samples under a microscope.

Quick summary

["A fungal culture can help diagnose infections caused by fungi in your upper respiratory area."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
91812-8
Short code
Fungus Upper resp Cult
Synonyms
Fungus Upper resp Cult
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
culture
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What Is a Fungal Culture Used For?

A fungal culture is primarily used to detect and identify fungi that may be causing an infection in your upper respiratory tract. This can be important for diagnosing conditions like fungal sinusitis or pharyngitis, especially in individuals with weakened immune systems or those at higher risk for fungal infections.

How Is the Sample Collected?

A healthcare provider will collect a sample from your upper respiratory tract, such as a swab from your nose or throat. The sample is then sent to a lab where it is cultured to grow fungal organisms over time.

What Does a Positive Result Mean?

A positive result indicates the presence of fungal organisms in your sample. This finding can guide treatment decisions, such as starting antifungal medications, but further testing may be needed to confirm the type of fungus and determine the best course of action.

How Long Does It Take to Get Results?

Results typically take several days to a couple of weeks, as fungi grow slowly in the lab. Delays can occur depending on the lab’s workload and the type of fungus present.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Upper Respiratory Fungal Culture

Frequently asked questions

Will I Need to Take Any Special Precautions Before the Test?
No special precautions are usually needed, but avoid using nasal decongestants or sprays 24 hours before the test, as they can affect sample accuracy.
How Accurate Is This Test?
Fungal cultures are generally reliable but can sometimes miss certain fungi or take longer to identify due to slow growth. False negatives may occur if the sample isn’t representative of the infection.
Can I Have the Results in a Timely Manner If I Have a Serious Infection?
If you suspect a serious fungal infection, your doctor may prioritize this test or order additional tests for faster results. However, delays are common due to the nature of fungal growth in labs.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy